Improve benchmarking / profiling

Added zip_command variant to benchmark.rb and added profile_memory.rb based on
the `memory_profiler` gem.

1 files changed, 2 insertions, 1 deletions

diff --git a/Gemfile b/Gemfile
index 45758bcc..861367af 100644
--- a/Gemfile
+++ b/Gemfile
@@ -17,5 +17,6 @@ group :test do
 end
 
 group :profile do
-  gem 'ruby-prof', :platforms => :ruby
+  gem 'memory_profiler'
+  gem 'ruby-prof', platforms: :ruby
 end